During the early days of a field season archaeologists lay out square test units and excavate through the top layer of soil (known as the 'plow zone'), which often has been disturbed by centuries of agricultural practices. In this photo Nicola Harrison, Eddie Dunlap, Justin Arocho, Cyndi Volbrecht, Jennifer Props, Rachel Istvan, Thane Harpole, and Ginny Horner (from left to right) begin excavations at the site.